CSS入门应用
01-结合方式01
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<!--
结合方式01:
在标签上加入style属性.
属性的值就是css代码.
-->
<p style="color:red;" >我的入门CSS</p>
</body>
</html>
02-结合方式02
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style type="text/css">
p {
color:blue;
}
</style>
</head>
<body>
<!--
结合方式02:
在页面的head标签中, 书写一个style标签.
在style标签中书写css代码.
-->
<p>Hello world</p>
<p><pre name="code" class="html">Hello World</p>
</html>
03-结合方式03
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<link type="text/css" rel="stylesheet" href="p.css" />
</head>
<body>
<!--
结合方式03:
在页面head标签中填写link标签
<link type="text/css" rel="stylesheet" href="p.css" />
type mime类型
rel 类型
href css文件路径
-->
<p>Hello World</p>
<p>Hello World</p>
</body>
</html>
04-选择器01-标签选择器
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style type="text/css">
p {
color:red;
}
</style>
</head>
<body>
<!--
标签选择器:
语法: 标签名 {
属性键:属性值;
}
-->
<p>Hello World</p>
<p>Hello World</p>
</body>
</html>
05-选择器02-ID选择器
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style type="text/css">
#one {
color:red;
}
</style>
</head>
<body>
<!--
ID属性唯一标识符.
要确保页面当中id属性的唯一性.
ID选择器:
语法: #ID {
属性键:属性值;
}
-->
<p id="one" >Hello World</p>
<p>Hello World</p>
</body>
</html>
06-选择器03-Class选择器
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style type="text/css">
.one {
color:green;
}
</style>
</head>
<body>
<!--
class属性可以随意重复.
CLASS选择器:
语法: .CLASS名称 {
属性键:属性值;
}
-->
<p class="one" >Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p class="one" >Hello World</p>
<h1 class="one" >Hello World</h1>
</body>
</html>
07-选择器04-选择器分组
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style type="text/css">
.one,#two {
color:yellow;
}
</style>
</head>
<body>
<!--
选择器分组:
语法: 选择器1,选择器2...... {
属性键:属性值;
}
-->
<p class="one" >Hello World</p>
<p id="two" >Hello World</p>
<p>Hello World</p>
<p class="one" >Hello World</p>
<h1 class="one" >Hello World</h1>
</body>
</html>
08-选择器05-伪类选择器
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style type="text/css">
a:link {
color:red;
}
a:visited {
color:green;
}
a:hover {
color:blue;
}
a:active {
color:yellow;
}
</style>
</head>
<body>
<!--
伪类选择器:指的是选择的某个标签的 某种状态
常见状态有4种,a标签最全.
l link 没有点击 过的状态
v visited 访问过
h hover 鼠标悬浮
a active 激活状态(鼠标点下去没有弹起)
-->
<a href="01-结合方式01.html" >01-结合方式01.html</a>
</body>
</html>
09-常见属性-字体
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style type="text/css">
p {
/*
font-size: 100px;
font-family: 黑体;
font-style: italic;
font-weight: 900;
font-variant: small-caps;
*/
font :italic small-caps 900 100px 黑体;
}
</style>
</head>
<body>
<p>Hello World</p>
</body>
</html>
10-常见属性-背景
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style type="text/css">
body {
/*
background-color: pink;
background-image: url("001.jpg");
background-repeat: no-repeat;
background-attachment: fixed;
*/
background : green url("001.jpg") no-repeat fixed center;
}
</style>
</head>
<body>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
<p>Hello World</p>
</body>
</html>
11-盒子模型-典型标签
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style type="text/css">
/*
块级标签: 占的是一行.
行内标签: 占行内的一部分. 不能嵌套 块级标签.
块级: div p ol
行内: span font a
*/
</style>
</head>
<body>
Hello World<div>Hello World</div>Hello World <br>
Hello World<span>Hello World</span>Hello World
</body>
</html>
12-盒子模型-div嵌套
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style type="text/css">
div{
border-color: red;
border- 1px;
border-style: solid;
}
#one{
200px;
height: 300px;
/*
内边距:
注意,内边距会改变自身的宽高.
*/
padding-left: 100px;
}
#two{
100px;
height: 100px;
/*
外边距
margin-left: 100px;
*/
}
</style>
</head>
<body>
<div id="one" >
<div id="two" >
</div>
</div>
</body>
</html>
13-盒子模型-内外边距的复合属性
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style type="text/css">
div{
/*
border-color: red;
border- 1px;
border-style: solid;
*/
border: 1px solid red;
100px;
height: 100px;
}
#one{
/*
1个属性时: 4个方向.
2个属性时: 第一个属性决定上下 第2个决定左右
3个属性时: 上 左右 下
4个属性时: 上 右 下 左(顺时针)
*/
padding: 10px 30px 50px 80px;
}
</style>
</head>
<body>
<div id="one" >
<div id="two" >
</div>
</div>
</body>
</html>
14-透明
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style type="text/css">
div{
border: 1px solid red;
}
#one{
background-color:black;
300px;
height: 300px;
}
#two{
background-color:white;
100px;
height: 100px;
opacity:0.7;
}
</style>
</head>
<body>
<div id="one" >
<div id="two" >
</div>
</div>
</body>
</html>